Pneumatic juice extractor



Sept. 30, 1952 Nl BATES ET AL PNEUMATIC JUICE EXTRACTOR 2 SHEETSSHEET 1 Filed July 21, 1950 RAY D. BATES NORMA L. BATES :mnentors I (Ittorneg$ p 1952 N. L. BATES ET AL 2,612,180

PNEUMATIC JUICE EXTRACTOR Filed July 21, 1950 2 SHEETSSHEET 2 FIG 5 1' 7" RAY 0. BATES a a? NORMA L. BATES Zhwentors new ,2

Patented Sept. 30, 1952 2,612,100 pneumatic mos nx'rmceron Norma'Lee-Bates and RayZD..Bates, Auburn, Wash.

ii ncacnn Efuly 2 1,?1950,SerialNofPYSIM momma. 101. 100- 122) This invention relates to improvements in a pneumatic juice extractor and, more particularly, is concerned with the provision of :a mechanism for expelling and expressing tfluids .irom ipulpe'd fiuidcontaimng fruit and wegetable materials,

Among the :more important objects ro'f this vention :are the provisions of ii'quid eXpel'ling means that is simple to construct, is relatively iriexpensivezissimpleto use, and'which efficiently carries out the 'fluidsextracti'on desired. mother and highly :important object has been the :provision of a simple :receptacle and receptacle closure construction that permits the :rapid :and ready :sealing of the mechanism at'the beginning of an extraction cycle and is easily and :readily unsealed at the rcompletion of an-zextra'ction cycle, which closure means is inexpensive, simple to constructaandoperate,Land includes a high degree of safety :for the operator during such times as the receptacle and its contents is being subjected to substantialpressures. Other objects and advantages .of the invention will vbeapparent-during the course of the following specification.

The accomplishment of the .foregoing and other objects of the invention has been achieved by providing a receptacle which has an upwardly open mouth and which is interiorly shaped adiacent saidmouth so thereis fa shoulder inside the receptacle that overhangs theinterior. There is a ported member in the receptacle and the pulped materialto be extracted is'p'laced in a sac thatris, when extraction is taking place, disposed 'ons'aid member. bladder 'is also placed in the receptacle chamber on top of the sac and a holddown closure lies on the bladder and is suitably engaged under said shoulder, whereupon fluid under pressure may be supplied to the bladder and as the latter expands, pressure is applied to the material within the sac to cause the expression therefrom of the fluid that is sought to be removed. In a preferred form of the invention the closure is formed in two halves which suitably block oif the mouth of the container and which abut each other along their chordal edges, and thus avoid buckling or dlsclocating one from another.

The invention in its preferred form is shown in the accompanying drawings, in which:

Figure 1 is a perspective view of the juice extractor of our invention with portions broken away and omitted for convenience of illustration;

Figure 2 is a vertical sectional view of the device shown in Figure 1;

Figure 3 is a perspective view of the closure member;

Figure 4 is a perspective View of the ported.

sac-supporting :s'helf used within the receptacle during juice extraction; and

Z'Figure 5 :is a perspective wi'ew or .a bladder.

used in 'our juice extractor.

A suitable form :of receptacle 'for use :in tour:

mechanism takes the term 'of an open-mouthed barrel "In, as shown in Figures -1 and 1-2, of the usual wooden -type. This barrel :has ca bottom 4 2.

firmly anchored :in :place and slightly above the bottom is outlet "port I=B which may receive. a spigot I 8 of :convrentionalnature tor selectively draining fluids from the interior.

As in usual barrel constructions, 'thisereceptacie ill converges (gradually to the mouth 20 so that, in 'efiec't, an :aminlar shoulder #22 (is provided "adjacent the mouth and which shoulder overhangs the enlarged interior ofthe scen talner Ill.

In Figure 4 we :have shown a ported :member 25 which :is. .-supported above the receptacle :bot-

tom l2. Thismember .forms a shelf within the receptacle for the reception of aIsac 2-4 and'icom prises two half-sections 26 and JZ-B each of which have .legs 30, is ported as at 32 and has corrugations 34 on their upper surfaces.

A bladder =38, which is circular ina preferred form, shown partially inflated .in Figure #5,, is

placed in the receptacle and inflated through air or other fluidsupplied to itsiinterior through the stem :38'by .meansof a .pump or pressure fiaskon a pair of halves 42, 44 and these are hingedlyj, joined as by hinges 46, 4B. The abuttingg edges, of the closure halves are oppositely notcl'iedt to",

form a port 48 through which the stem 38'may; be passed.

A flexible strand such as the short length of chain 5!], is joined at each end to one of the closure halves 42, 44 and crosses the hinge axis. This strand serves as an efiective and simple means and causes the upper faces of the closure halves to swing on their hinges toward each other and to, in efiect, collapse the closure for insertion and removal purposes past the restricting shoulder 22.

In operation, "fruit and vegetable material, which has first been pulped and comminuted, is placed in the sac 24 and the same placed upon halves abut along their chordal edges and as long as they are thus retained cannot escape from the're'ceptacle. Fluid pressure is then supplied to the bladder, it expands and presses solidly and firmly down upon the sac and its contents, causing the fluids to be expressed. The corrugations of the shelf member 25 insure that the sac does not seal the upper ends of ports 32 which terminate in the valleys of the corrugations. Fluids that have beenexpressed collect in the receptacle below the shelf member 25.

When it is desired to disassemble the mechanism, the bladder is deflated, relieving the cover or closure 40 of pressure and permitting it to descend from below shou1der'22. Then'by graspingthe strand 50 the two halves are hingedly moved and turned slightly sideways whereby the cover ancl the bladder are withdrawn from the receptacle. Closing together of the two halves with the bladder stem in the port 48, results in the latter being pinched, whereupon the bladder canbe carried along with the cover plate. The sac and the divided shelf member 25 can then be removedand the whole interior of the receptacle is exposed for cleansing and sterilizing.

We have shown and described a preferred form of our invention but it is to be understood that modifications and alterations of the parts are contemplated within the'spirit and scope of the subjoined claims.

What we claim is: I

*1. A mechanism for expressing fluids from pulped fluid-containing fruit and vegetable materials,-comprising: a receptacle having an upwardly open circular mouth, said receptacle being shaped interiorly so that adjacentsaid mouth is provided an annular shoulder overhanging the interior of said receptacle; a sac; a lower ported member in said receptacle to support above the bottom of said receptacle said sac containing the pulped material from which fluid is to be expressed; an inflatable bladder adapted to lie upon such a sac within said receptacle, said bladder having an upstanding stem adapted to receive fluid under pressure for the inflation of said bladder;' and a circularclosure platefor said receptacle adapted to overlie said bladder, said closure plate being ported to receive said upstanding bladder stem and including a pair of semi-circular plate halves the curved edges of which are shaped to engage said receptacle interior beneath the annular shoulder and, when lying in a common plane with the chordal edges in juxtaposition, to resist upward expulsion from said receptacle upon the i'inflati'on of the bladder, said closure plate being removable when said bladder is deflated by movement of said plate halves out of coplanar relationship in which con- 1 dition said plate halves may be withdrawn from said receptacle through said open mouth.

2'. The structure according to claim 1 in which the closure plate halves are hinged together in a manner to permit the upper faces thereof to close together, and a flexible strand is joined at each end to each of the upper faces of the closure plate halves and the strand crosses the hinge axis.

3. The structure according to claim 1 in which the curved edges ofthe closure plate are frustoconical in shape and in which the portion of said annular shoulder against which said closure plate abuts is generally frusto-conical in shape and generally the same size and shape as said curved edges of said closure plate.

4. The structure according to claim 1 in which 'the curved edges of the closure plate arefrustoconical in shape and in which the portion of said annular shoulder against which said closure plate abuts is generally vfrusto-conical in shape and generally the same size and shape as said curved" i edges of said closure plate, and the two halves of said closure plate are hingedly joined together to permit the upper faces to be brought together.

' NORMA LEE BATES.

RAY D. BATES.

REFERENCES CITED The following references are of record in the file of this patent: 1

UNITED STATES PATENTS 

